Though much of the information had been previously released, the morning tour allowed people to get a look at the trail.

Many people have already been using the trail — somewhat illegally — but police have warned that starting Friday, trespassers will be arrested.

"It's now a construction site and tightly controlled and actually quite dangerous," warned Steven Beard of the Trust for Public Lands before beginning the tour.

So attendees donned hard hats, safety glasses and orange safety vests and climbed up the dirt ramp at Kimball and Bloomingdale avenues to get a look at the trail while still overgrown with wild grasses and railroad detritus.

Itamar Amrany, 24, an art studio manager from Highland Park, said though he doesn't live in the city, he was curious about what kind of planning was going into The 606.

"I haven't followed it as closely as some other people," he said, "but I wanted to get a sense of the planning, what went into the planning, and the involvement with community."

Amrany said he was pleased to learn that The 606 had looked to the community for help with the planning and that he hoped to be able to make use of the park when visiting the city or if he decides to move here.

Another attendee, Chi Chi Okwu, said it was a general interest in urban planning that brought her to the event as well.

Though the 32-year-old associate pastor lives in Lakeview, she said she, too, will likely make use of the park, and enjoyed hearing about the progress.

"I'm just interested in urban planning and creating spaces for community so I was interested," Okwu said about the event. "I really liked to hear about the collaboration between engineering and art and about taking the community on a journey with the space."

Chicago Ideas Week continues through Sunday. A list of events can be found on ChicagoIdeas.com.